ManytaskstypicalforHighEnergyPhysicssuchassimulation,eventdisplay,maintenanceofthegeometrydatabaseofanexperiment,requireinputofgeometricaldata.TosimplifytheprocessofpreparationofsuchkindsofdataaninteractivegraphicatoolGBuilderisbeingdevelogped.DefinitionofthegeometrymodelinGBuilderisbasedontheConstructiveSolidGeometryapproachwhereobjectsaredefinedusingbooleanoperationsonbasicshapes.Toprovidsparameterizationofthemodelarithmeticexpressionsmaybeusedinplaceofnumbers,Awidelistofpredefinedmaterialsisalsoavailable.Differentdriversallowtooutputthegeometrymodelinaformsuitableforspecificsimulationofvisualanalysistools.
